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Method for preparing plaster evacuated mould

A cavity mold and gypsum technology, which is applied to clay preparation devices, chemical instruments and methods, manufacturing tools, etc., can solve the problems of inconvenient assembly line production, low production efficiency, inconvenient production, etc., and achieve prolonged final setting time and increased strength , The effect of prolonging the initial setting time

Inactive Publication Date: 2009-09-16
贵州金三利科技建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is inconvenient to manufacture such formwork components, the production efficiency is low, it is not convenient for assembly line production, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method of gypsum cavity mold comprises the following steps:

[0016] (1) Weigh the ingredients according to desulfurization gypsum: fly ash: glass fiber: sodium lignosulfonate (mass ratio) = 83: 12: 3: 2;

[0017] (2) Measure water according to the water-cement ratio (mass ratio)=0.52, then pour it into the mixing tank with the above-mentioned prepared raw materials respectively, start the mixer at the same time, the rotating speed is 200r / min, and stir quickly for 2 minutes;

[0018] (2) Apply mineral oil on the four walls and the bottom surface of the mold, then pour the mixed slurry into the mold, smooth the upper surface of the gypsum cavity mold, take out the solidified gypsum cavity mold from the mold, and finally dry the gypsum naturally for the finished product.

[0019] After testing, the finished gypsum cavity mold has a compressive strength of 12.1MPa and a flexural strength of 3.70MPa.

Embodiment 2

[0021] (1) Desulfurization gypsum: Portland cement: glass fiber: olefin maleate copolymer (mass ratio) = 81: 14: 3: 2 weighing ingredients;

[0022] (2) Measure water according to the water-cement ratio (mass ratio)=0.55, then pour it into the mixing tank with the above-mentioned prepared raw materials respectively, start the mixer at the same time, the rotating speed is 150r / min, and stir quickly for 3 minutes;

[0023] (2) Apply mineral oil on the four walls and the bottom surface of the mold, then pour the mixed slurry into the mold, smooth the upper surface of the gypsum cavity mold, take out the solidified gypsum cavity mold from the mold, and finally dry the gypsum naturally for the finished product.

[0024] After testing, the finished gypsum cavity mold has a compressive strength of 11.6MPa and a flexural strength of 2.45MPa.

Embodiment 3

[0026] (1) Weigh the ingredients by phosphogypsum: porcelain powder: glass fiber: magnesium lignosulfonate (mass ratio) = 85: 10: 3.5: 1.5;

[0027] (2) Measure water according to the water-cement ratio (mass ratio)=0.49, then pour it into the mixing tank with the above-mentioned prepared raw materials respectively, start the mixer at the same time, the rotating speed is 200r / min, and stir quickly for 3 minutes;

[0028] (2) Apply synthetic oil on the four walls and bottom surface around the mold, pour the mixed slurry into the mold, smooth the upper surface of the gypsum cavity mold, take out the solidified gypsum cavity mold from the mold, and finally dry the gypsum naturally for the finished product.

[0029] After testing, the finished gypsum cavity mold has a compressive strength of 12.3MPa and a flexural strength of 3.67MPa.

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Abstract

This invention discloses a method for preparing plaster evacuated mould, including following steps: weighting and mixing the raw material based on that the mass ratio of plaster: inorganic filling material: glass fiber: high efficiency water reducing agent (mass ratio) is 80-90:10-20:3-4:0.5:2.5; weighting water based on the cement water ratio of o.45 to 0.65 by calculating with mass, then pouring the prepared raw materials into a stirring pot, at the same time, opening the stirrer, quickly stirring for 1 to 3 min with the rotating speed of 100 to 300 r / min; coating mineral oil at the four sides and the bottom of the module, then pouring the mixed ground paste into the mould, screeding the upper surface of the plaster evacuated mould, fetching out the concretionary plaster evacuated mould from the module, finally naturally drying the mould. The product prepared by this invention has short time for drying, enlarged delayed coagulation time and can improve the intensity and the hard wearing performance.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing a gypsum cavity mold. Background technique [0002] At present, in my country's industrial and civil buildings, the reinforced concrete structure is still the most widely used architectural structure because of its wide range of raw materials, mature technology, low cost, and strong vitality. In the cast-in-place concrete structure, the beamless floor technology using gypsum cavity mold is a new type of cast-in-place structural system developed after the beamless floor, ordinary beam slab, densely ribbed floor, and unbonded prestressed slab. The construction cost using this technology is 15% less than that of ordinary reinforced concrete frames. At the same time, the bottom of the floor slab is flat and no beams appear, and no suspended ceiling is required, thus saving decoration costs; and the light weight can effectively reduce the earthquake effect, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/14B28B1/29B28C7/04B28C5/08B28C5/40C04B28/14C04B14/42
CPCC04B28/142C04B28/14C04B2111/2038C04B41/4511Y02W30/91C04B7/02C04B18/023C04B18/08C04B18/141C04B2103/302C04B24/18C04B24/226C04B24/2641C04B41/472
Inventor 刘建平杜礼昌肖良锦
Owner 贵州金三利科技建材有限公司
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